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Andrea Dittadi

Collaborating researcher - Helmholtz AI
Supervisor
Research Topics
Causality
Computer Vision
Deep Learning
Generative Models
Probabilistic Models
Representation Learning

Publications

Foundations of Diffusion Models in General State Spaces: A Self-Contained Introduction
Vincent Pauline
Kirill Neklyudov
Multi-Modal and Multi-Attribute Generation of Single Cells with CFGen
Alessandro Palma
Till Richter
Hanyi Zhang
Manuel Lubetzki
Fabian J. Theis
Generative modeling of single-cell RNA-seq data is crucial for tasks like trajectory inference, batch effect removal, and simulation of real… (see more)istic cellular data. However, recent deep generative models simulating synthetic single cells from noise operate on pre-processed continuous gene expression approximations, overlooking the discrete nature of single-cell data, which limits their effectiveness and hinders the incorporation of robust noise models. Additionally, aspects like controllable multi-modal and multi-label generation of cellular data remain underexplored. This work introduces CellFlow for Generation (CFGen), a flow-based conditional generative model that preserves the inherent discreteness of single-cell data. CFGen generates whole-genome multi-modal single-cell data reliably, improving the recovery of crucial biological data characteristics while tackling relevant generative tasks such as rare cell type augmentation and batch correction. We also introduce a novel framework for compositional data generation using Flow Matching. By showcasing CFGen on a diverse set of biological datasets and settings, we provide evidence of its value to the fields of computational biology and deep generative models.